Auto Loan Calculator
Estimate your monthly car payment based on vehicle price, down payment, trade-in value, interest rate, and loan term.
| Vehicle price | |
| Down payment | |
| Trade-in value | |
| Sales tax | % |
| Loan term | months |
| Interest rate | % per year |
Result
Your payment estimate will appear here.
Notes
This estimate applies sales tax to the vehicle price and subtracts your down payment and trade-in to estimate the amount financed. Fees and insurance vary by lender and location.
How it works
This estimates a fixed-rate auto loan payment based on the amount financed. Amount financed is typically the vehicle price minus down payment and trade-in (taxes/fees depend on what you include).
Formula
- Financed amount P = price − down payment − trade-in (as entered)
- Monthly rate r = annual rate ÷ 12; payments n = months
- Payment M = P × r × (1+r)n ÷ ((1+r)n − 1). If r = 0, M = P ÷ n.
Worked example
$30,000 car, $5,000 down, $2,000 trade-in → $23,000 financed at 6% for 60 months gives about $444.65/month.
Assumptions
- Estimate only: taxes, registration, dealer fees, rebates, insurance, and variable rates are not automatically included unless you enter them.
Estimate for general information only, not financial advice.
How to use the Auto Loan Calculator
It takes a few seconds, and every figure is calculated in your browser.
- Enter the vehicle price.
- Enter the down payment.
- Enter the trade-in value.
- Enter the sales tax.
- Enter the loan term.
- Enter the interest rate.
- Press Calculate — the result appears in the dark panel beside the form.
- Use Copy, CSV, Share or Print under the result if you want to keep it.
Auto Loan Calculator — frequently asked questions
What formula does the Auto Loan Calculator use?
Financed amount P = price − down payment − trade-in (as entered) Monthly rate r = annual rate ÷ 12; payments n = months Payment M = P × r × (1+r) n ÷ ((1+r) n − 1). If r = 0, M = P ÷ n.
How does the Auto Loan Calculator work?
This estimates a fixed-rate auto loan payment based on the amount financed. Amount financed is typically the vehicle price minus down payment and trade-in (taxes/fees depend on what you include).
What assumptions and limitations should I know about?
This estimate applies sales tax to the vehicle price and subtracts your down payment and trade-in to estimate the amount financed. Fees and insurance vary by lender and location.
Can you walk through a worked example?
$30,000 car, $5,000 down, $2,000 trade-in → $23,000 financed at 6% for 60 months gives about $444.65/month.
Last updated 10 November 2026 · Formula, worked example and assumptions are documented above, and every result is calculated in your browser.